English 39 – Toshiba BDX2400 User Manual

Page 39

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English

39

When we speak of free software, we are referring

to freedom of use, not price. Our General Public

Licenses are designed to make sure that you have

the freedom to distribute copies of free software

(and charge for this service if you wish); that you

receive source code or can get it if you want it; that

you can change the software and use pieces of it in

new free programs; and that you are informed that

you can do these things.

To protect your rights, we need to make restrictions

that forbid distributors to deny you these rights

or to ask you to surrender these rights. These

restrictions translate to certain responsibilities for

you if you distribute copies of the library or if you

modify it.

For example, if you distribute copies of the

library, whether gratis or for a fee, you must give

the recipients all the rights that we gave you. You

must make sure that they, too, receive or can get

the source code. If you link other code with the

library, you must provide complete object fi les to

the recipients, so that they can relink them with

the library after making changes to the library and

recompiling it. And you must show them these

terms so they know their rights.

We protect your rights with a two-step method:

(1) we copyright the library, and (2) we offer you

this license, which gives you legal permission to

copy, distribute and/or modify the library.

To protect each distributor, we want to make it

very clear that there is no warranty for the free

library. Also, if the library is modifi ed by someone

else and passed on, the recipients should know that

what they have is not the original version, so that

the original author’s reputation will not be affected

by problems that might be introduced by others.

Finally, software patents pose a constant threat

to the existence of any free program. We wish

to make sure that a company cannot effectively

restrict the users of a free program by obtaining a

restrictive license from a patent holder. Therefore,

we insist that any patent license obtained for a

version of the library must be consistent with the

full freedom of use specifi ed in this license.

Most GNU software, including some libraries,

is covered by the ordinary GNU General Public

License. This license, the GNU Lesser General Public

License, applies to certain designated libraries, and

is quite different from the ordinary General Public

License. We use this license for certain libraries in

order to permit linking those libraries into non-free

programs.

When a program is linked with a library, whether

statically or using a shared library, the combination

of the two is legally speaking a combined work,

a derivative of the original library. The ordinary

General Public License therefore permits such

linking only if the entire combination fi ts its criteria

of freedom. The Lesser General Public License

permits more lax criteria for linking other code with

the library.

We call this license the “Lesser” General Public

License because it does Less to protect the user’s

freedom than the ordinary General Public License.

It also provides other free software developers

Less of an advantage over competing non-free

programs. These disadvantages are the reason we

use the ordinary General Public License for many

libraries. However, the Lesser license provides

advantages in certain special circumstances.

For example, on rare occasions, there may be a

special need to encourage the widest possible use

of a certain library, so that it becomes a de-facto

standard. To achieve this, non-free programs must

be allowed to use the library. A more frequent case

is that a free library does the same job as widely

used non-free libraries.

In this case, there is little to gain by limiting the

free library to free software only, so we use the

Lesser General Public License. In other cases,

permission to use a particular library in non-free

programs enables a greater number of people to

use a large body of free software. For example,

permission to use the GNU C Library in non-free

programs enables many more people to use the

whole GNU operating system, as well as its variant,

the GNU/Linux operating system.

Although the Lesser General Public License is Less

protective of the users’ freedom, it does ensure that

the user of a program that is linked with the Library

has the freedom and the wherewithal to run that

program using a modifi ed version of the Library.

The precise terms and conditions for copying,

distribution and modifi cation follow. Pay close

attention to the difference between a “work based

on the library” and a “work that uses the library”.

The former contains code derived from the library,

whereas the latter must be combined with the

library in order to run.

TERMS AND CONDITIONS FOR COPYING,

DISTRIBUTION AND MODIFICATION

0. This License Agreement applies to any software

library or other program which contains a notice

placed by the copyright holder or other authorized

party saying it may be distributed under the terms

of this Lesser General Public License (also called

“this License”). Each licensee is addressed as “you”.

A “library” means a collection of software functions

and/or data prepared so as to be conveniently

linked with application programs (which use some

of those functions and data) to form executables.

The “Library”, below, refers to any such software

library or work which has been distributed under

these terms. A “work based on the Library” means

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